Stab Assembly Dual Connection Panelboard
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing panelboards and switchgear assemblies are limited in their ability to accommodate both plug-on and bolt-on connections for electrical switching apparatus, restricting their versatility and reliability in power distribution systems.
Innovation Solution
The development of a stab assembly with twofold and onefold line terminals that include both bolt-on and plug-on portions, allowing for secure mechanical and electrical connections to bus bars, ensuring redundancy in electrical contact points for reliable current transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If panelboards use springs for plug-on connections, then ease of installation is improved, but compatibility with bolt-on electrical switching apparatus deteriorates
Solution Approach 1:
The bus bar assembly is designed with dual functionality: it includes both spring-loaded plug-on connection features and bolt-on connection features. The stab assembly can accommodate electrical switching apparatus using either plug-on or bolt-on methods, making the panelboard universal in its compatibility with different apparatus types.
Solution Approach 2:
The bus bar assembly is segmented into distinct connection regions: one region equipped with springs for plug-on connections and another region with bolt holes for bolt-on connections. This segmentation allows each connection type to function independently while being part of the same integrated assembly.
2Strength
If panelboards use bolts for bolt-on connections, then structural strength is improved, but ease of installation deteriorates
Solution Approach 1:
The bus bar assembly merges two connection methods (bolt-on and plug-on) into a single integrated structure. Users can choose the appropriate connection method based on their needs, combining the strength of bolts with the ease of plug-on installation in one assembly.
3Device complexity
If line terminals have single contact points, then device complexity is reduced, but reliability of current transfer deteriorates
Solution Approach 1:
The line terminal is designed with different contact regions: one contact point for plug-on connection and another contact point for bolt-on connection. Each contact point provides a reliable electrical path, and the presence of multiple contact points ensures that current transfer reliability is maintained regardless of which connection method is used.
Data Source
AI summary
A stab assembly includes at least one bus bar having and an elongated extension, and a number of line terminals including at least one twofold line terminal. The twofold line terminal has a plug-on portion having an engaging portion. The engaging portion substantially overlays and engages the elongated extension.